Question

question 9 of 10
which situation is an example of equilibrium?
a. a blade of grass slowly grows taller.
b. the amount of water in a cup does not change.
c. the amount of air in a room slowly increases.
d. the percentage of nitrogen gas in a room decreases steadily

Explanation:

Equilibrium is a state where there is no net change. In option C, the amount of water in a cup not changing represents a state of equilibrium as there is no net gain or loss of water. Option A shows growth which is a change. Option B shows a change in the amount of air. Option D shows a change in the percentage of nitrogen gas.

Answer:

C. The amount of water in a cup does not change.